The largest borough in Alaska
There are two right answers. By land area it is Yukon-Koyukuk Census Area; by population it is Anchorage Municipality. Which one you want depends on what you meant by largest.
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.
By land area
| Rank | Name | Land area | Population |
|---|---|---|---|
| 1 | Yukon-Koyukuk Census Area | 145,767 sq mi | 5,028 |
| 2 | North Slope Borough | 88,793 sq mi | 10,582 |
| 3 | Bethel Census Area | 40,655 sq mi | 18,391 |
| 4 | Northwest Arctic Borough | 35,672 sq mi | 7,095 |
| 5 | Southeast Fairbanks Census Area | 24,839 sq mi | 7,270 |
| 6 | Matanuska-Susitna Borough | 24,707 sq mi | 118,666 |
| 7 | Copper River Census Area | 24,647 sq mi | 2,666 |
| 8 | Lake and Peninsula Borough | 23,897 sq mi | 1,357 |
| 9 | Nome Census Area | 22,970 sq mi | 9,830 |
| 10 | Dillingham Census Area | 18,353 sq mi | 4,483 |
By population
| Rank | Name | Population | Density |
|---|---|---|---|
| 1 | Anchorage Municipality | 287,155 | 168 per sq mi |
| 2 | Matanuska-Susitna Borough | 118,666 | 4.8 per sq mi |
| 3 | Fairbanks North Star Borough | 93,972 | 12.8 per sq mi |
| 4 | Kenai Peninsula Borough | 61,951 | 3.9 per sq mi |
| 5 | Juneau City and Borough | 31,609 | 11.7 per sq mi |
| 6 | Bethel Census Area | 18,391 | 0.45 per sq mi |
| 7 | Ketchikan Gateway Borough | 13,549 | 2.8 per sq mi |
| 8 | Kodiak Island Borough | 12,387 | 1.9 per sq mi |
| 9 | North Slope Borough | 10,582 | 0.12 per sq mi |
| 10 | Nome Census Area | 9,830 | 0.43 per sq mi |
And the smallest
More on Alaska
Rebuilt from source data 30 August 2026. How these figures are produced.